Well, I do have some internal data collection, but it's very ad-hoc and suffers from quite bad sampling, so I've been hesitant in sharing it if for no other reason than for risks of misinterpretation (for sure, it has at least missed some quite significant peaks due to the sampling problems). The plotting is also horrible. But sure, have a look:
Concurrent users:
Accumulative users:
Please avoid making extensive conclusions or sharing this "irresponsibly" as being authoritative data, though, due to the many problems with the data collection. Hafen will bring massive improvements to the data collection thanks to a much better IPC architecture.
As a point of curiosity from our web stats, "Adolf Hitler" is a consistently high Google search string that lands people on the forums. ^^
30,000+ concurrent users in Eve: Color me jelly.